Document text
International Journal of Innovative Research in Computer Science & Technology (IJIRCST)
ISSN: 2347-5552, Volume-10, Issue-2, Mar 2022
https://doi.org/10.55524/ijircst. 2022.10.3.71
Article ID CST1042, Pages 352-356
www. ijircst.org
A Study of Several Water Purification Techniques
Dr. Rajan Jakhu
Assistant Professor, Basic & Applied Sciences, RIMT University, Mandi Gobindgarh, Punjab, India
Correspondence should be addressed to Dr. Rajan Jakhu; rajan @rimt.ac.in
Copyright © 2022 Made Dr. Rajan Jakhu. This is an open-access article distributed under the Creative Commons Attribution License,
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
ABSTRACT- Current article provides an overview of
current water purification, filtration methods, &
technologies. water purification is primarily addressed for
a sensitive reason: it is one of most important sources of
survival for all living things. water may be found in various
forms on earth's surface, & lakes & rivers provide a
significant quantity of drinking water. all living things
need water to survive, but humans require filtered water
that is high in minerals & salts. lack of germs & disease-
causing microbes, dissolved metal ions, & heavy
contaminants is referred to as pure water. drinking water
must be not only pure but also healthful in order to be fully
functional. some water purification methods use hazardous
polymers & terrible chemical compositions. n-current
methods for water purification & filtration were upgraded
& incorporated into nanotechnology & polymers. reverse
osmosis is foundation for any purification process that
employs semipermeable membranes with ultra, micro, &
nano porous membranes to remove _ germs,
microorganisms, minerals, & salts. if consumed over an
extended period of time, this ro-processed water may cause
sickness. to overcome need to add minerals & salts to
water, fiber composites & mineral cartridges were
developed. all of se water purification methods, as well as
use of fiber composites & polymer membranes, are
discussed in this article, along with flaws that may do a lot
of harm to humanity.
KEYWORDS- Chlorination, Coagulation, Filtration,
Purification, water.
I. INTRODUCTION
Water is one of most important resources for all living
things on our planet. Water is critical for survival of life
on Earth. On Earth, life cannot live without water. Humans
need water for drinking, agriculture, & a variety of or
purposes. Water is also required for survival of plants &
creatures on our planet. Humans will lose one of ir major
sources of nourishment if water is not available. We can
already see areas of globe where re is insufficient water.
re has an observation made using satellite data from moon
& some of closest planets to Earth, such as Mars, that re
are dead corpses in space, indicating that water is
extremely important for life to survive. Consider world
without water. When soil is devoid of water, it becomes
lifeless & dry. y had taken a lot of water from ground in
California's Central Valley, where agriculture is major
profession. As a consequence, 1& became an extremely
dry region that used to be like a sponge. Subsidence is term
for this process. Consider what would happen if re was no
water in air. sun's energy will vaporize clouds. Without
m, dry air would absorb moisture from everywhere it could
find it, & any being's problems would shrivel[1—5].
Water has also provided functions such as temperature
moderator, which mostly entails cooling ground when it
becomes overheated. Similarly, as earth becomes colder,
water warms it up a bit & creates a living environment.
When temperature rises, water evaporates, cooling planet
& keeping atmosphere temperate. Water is crucial in
preventing effects of volcanoes & certain forest fires. Rain
from clouds is a type of water that has drained from earth,
making earth's surface & ground colder during day &
warmer at night. Water not only gives rise to life on 1&, but
also to life in oceans & or bodies of water. Fish, trees,
birds, certain kinds of algae, insects, krill, & many or forms
of life that live in water or on 1& rely on water for
existence. Honey bees need water to produce honey, &
flowers require water to prepare nectar; plants require a
large amount of water to complete photosynsis process.
Even in arctic regions, re is some life, although this is due
on presence of water. Finally, humans need a large amount
of water for ir survival, as well as for industrial & domestic
uses[6].
Finally, humans need a large amount of water for ir
survival, as well as for industrial & domestic uses. Water
is also known as _ giver of life & creator of life. Water is
one of cycle components among all basic elements of life.
hydrogenated cycle, often called as water cycle, operates
as follows: water will first evaporate, forming clouds that
will shield us from sun's direct rays, giving a cooling
impact. y'll be cooled enough to condense & rain. Water
plays a significant part in birth of various living creatures,
including people, animals, & birds. Mammalian sperm
contain a lot of water, which helps with egg impregnation.
To carry baby within womb & nourish infant via amniotic
fluid, female body requires a lot of nutritional water.
infant is delivered with a rush of liquids & water, which
must be treated right away with nutrient-rich water. eggs
produced by bird families are mostly made up of water
mixed with nutrients needed for ir survival. As a result,
reproduction necessitates a lot of water[7—12].
As a result, reproduction necessitates a lot of water.
Maintaining low water levels in body has a number of
negative consequences. As a result, drinking water is more
than simply a fluid; it is also a source of riches. Many
nations across globe still use unfiltered drinking water. y
are becoming living meat to viruses, producing diseases
like typhoid & diarrhoea. Water is made up of two
elements: hydrogen & oxygen, which are chemically
expressed as H20. On a daily basis, a healthy person need
approximately 2 litres of water. It aids in reduction of
mental tension at work, & greater amount is required for
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International Journal of Innovative Research in Computer Science & Technology (IJIRCST)
such situations. amount of water needed for drinking
changes based on wear. In warmer climates, it is necessary
to drink extra water to keep body hydrated[3].
Water provides many nutrients that are beneficial to
muscle cells & tiredness. It prolongs feeling of being full
in stomach. Water makes up about 60% of our entire body
weight, with brain accounting for at least 90% of that. In
human digestive system, water aids in digesting process.
Even our face cleansers include most water possible, since
this is greatest way to avoid skin wrinkles. Water must
have essential minerals & be free of disease-causing
microorganisms in order to provide advantages of water.
quantity of vital nutrients in water varies depending on
where you live. World Health Organization (WHO) has
established drinking guidelines for various locations. In
certain locations, re are more components than are
required. Nearly 95 percent of critical minerals & salts are
required for human health. According to a WHO study
from 1980, low-mineral water is not regarded optimal &
may lead to mineral insufficiency. Mineral deficiency
causes a variety of health issues, including bone weakening
& lowered immunity. Nowadays, reverse osmosis method
is widely used & has formed foundation for a variety of
water purification & filtration processes[9][13—17].
A. Methods of water purification
1) Distillation
It is process of heating water to a boiling temperature in
order to remove solid particles.
2) Sedimentation
Sedimentation occurs when particles that have settled on
fluid's surface continue to collide. Because of factors such
as gravity & electromagnetism, particles in motion come
to a halt during this phase.
3) Filtration
This technique says that water is forced to flow through a
medium, such as a filter; however, since water is a liquid,
it comes out, but solid particles are prevented from
entering with it, resulting in solid particles & liquid being
separated. Filtration, which can eliminate all hazardous
bacteria, germs, & minute particles on a size basis, is most
popular method of getting clean water se days. One of bio-
based material choices is cellulose-based filters, which are
inexpensive & can remove any size of bacteria depending
on its nature. A three-layer filter can remove 97 percent of
E.coli from water, while a modified five-layer filter may
remove up to 99.9% of bacteria that causes bloody
vomiting & diarrhea. se multi-layered membranes are
produced from cellulose fibers removed from surfaces in a
commercial manner of production that includes anionic &
cationic polyelectrolyte poly acrylic acid in moderation at
room temperature[18].
number of filter sheets utilized in filtering process, which
traps a lot of bacteria on top of m, has risen, resulting in an
increase in bacterial reduction. findings demonstrate
possibility for water purification by using bio-based filters
that may be consumed using a simple modification
method. filters were selected for future water purification
purposes, which will save lives by reducing need of
bactericides.
Deionization:
Deionization is a chemical purification technique that
eliminates ionic pollutants from water. Cations & anions
react with ion exchange resin & are exchanged for
hydrogen ions & hydroxyl ions when water passes over it.
4) Chlorination
Chlorination is process of adding sodium hypo chlorate
(SHC) to water to kill germs since SHC is extremely
poisonous & kills m quickly.
5) Coagulation
This is a process in which impurities dissolved in water are
forced to clot by addition of a coagulant. Iron salt,
aluminium salts, & aluminium sulphate are some of
coagulants used in this procedure.
6) Photo oxidation
Photo oxidation is a kind of photochemical oxidation that
makes use of UV light. This technique is advertised as a
way to destroy organic molecules in water. UV rays are
transmitted over water we need to filter, & bacteria in
water lose ir capacity to live as a result of rays. quantity
of bacteria destroyed is determined by length of time UV
rays are present & ir intensity. Pesticides & heavy metal
ions in water are among pollutants that are eliminated.
7) Reverse Osmosis process
Itis method by which pollutants are dispersed & cleansed
via use of a membrane. Semi permeable membrane is a
thin composite membrane that is utilized in reverse
osmosis process. Using this method, a large amount of dust
& trash may be removed. method is divided into three
stages: pre-treatment of water, a pump for raising water
velocity, & a semi-permeable membrane for dust
separation[19]. Because it is separated into clean water, it
may be used as feed water in rmal power plants. This
method may be used to eliminate harmful inorganic
particles.
&) Mineral Cartridges
Mineral cartridges are a 5 step membrane filtering system
that was developed in recent technology. following are
some of cartridge's features: It cleanses acidic metabolites
as well as cellular-level poisons. Minerals such as calcium,
potassium, sodium, & magnesium are provided via se. se
also have a tiny water cluster that may hydrate human
body three to four times more efficiently than regular
water. Mineral & nutrient adsorption is facilitated by use
of a cartridge. This may help to restore body's nutritional
balance, as well as increase power of water by decreasing
activities of oxygen radicals, which may lead to diabetes &
cancer[20].
A. Different water treatment processes using by
different countries
Nigerian students cleaned water using natural plant fibers.
y purified household water using coconut husk & costus
afer. y collected fibers by exposing plants to light for an
extended period of time & n extracting fibers. Because
coconut fiber eliminates chlorophyll from costus leaves,
filtrate y created is colorless. se fibers mostly absorb
metals containing hydroxyl. Using this method, y were
able to remove contaminants to some degree. Water
retreatment can also purify sewage water, & many
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International Journal of Innovative Research in Computer Science & Technology (IJIRCST)
countries are already using various waste water treatment
methods, such as Jordan's bio filtration process, Turkey's
stabilization ponds, Lebanon's grit & scum removal
technique, & Palestine's oxidation ditches & extended
aeration processes for water filtering. Humans are
susceptible to a variety of illnesses, including typhoid, if y
are not purified.
Water's physical & chemical characteristics are now
divided into two categories: potable & habited water.
Potable water is drawn from various locations around a
city, whereas habited water is drawn from various lakes &
seas. y investigated physical characteristics of water, such
as temperature, color, odor, taste, pH, & TDS levels. y
determined various limits for drinking water & said that
water ingested by people is known as potable water,
whereas water eaten by animals is known as habited water.
pH, temperature, turbidity, & TDS levels are among
variables that come into play throughout se processes.
B. Remineralization
Drinking RO processed water has a number of negative
consequences, including a reduction in potential due to a
lack of minerals & an increase in corrosiveness.
Consuming this over an extended length of time may cause
significant changes in human metabolism & digestion,
affecting operation of key bodily organs such as_ kidneys
& heart. This is due to fact that following RO procedure,
water we drink is devoid of minerals such as magnesium
& calcium. Desalination is term for this process.
According to WHO, drinking water should include
approximately 30mg/L of calcium & a little quantity of
magnesium, namely 10mg/L, as well as or beneficial
additions. Our current scientists are working on ways to
add minerals, & several methods have suggested [5].
following are key steps in making a mineral-rich salt:
e Calcium sulphate & sodium bicarbonate are added
e Carbon dioxide dissolves Ca (OH)2.
e Excess hydrated lime & carbon dioxide are applied.
e Hydrated lime & sodium carbonate are added.
C. Types of membrane
1) Semi permeable membrane
When water is forced through semi permeable membrane,
it is composed of a polymeric, syntic material that will not
enable big particles of dissolved contaminants to pass
through. Water with hazardous particles or inorganic
substrates will flow through membrane, but dissolved
contaminants will be trapped in membrane filter.
municipal water is purified using this water. This is a basic
design that develops spontaneously from cellulose. This
semi porous structured membrane [6] may separate feed
water including suspended particle contaminants. A nano
filtering membrane is now being produced in current
technologies by progressing to a semi permeable
membrane for separation of dissolved contaminants of
nano sizes.
2) Nano membrane
size of this porous structure differs from that of a
semipermeable membrane. It has pore sizes ranging from
1 to 10 nanometres & is used to filter out nanoparticle-
sized debris from water. major difference between two
membranes is size of holes. solid particles of nano sizes
may be removed from municipal water using this sieve.
This membrane is used to produce drinkable water & is
effective at eliminating ions such as Nacl & divalent ions
like Na2S04 [7].
3) Cellulose membrane
Nano cellulose is a mix of surface chemistry of flexibility,
chemical inertness, & a larger surface area, as well as
complex strength & is a renewable material. We will
provide a short overview of nano cellulose synsis, as well
as its impacts on adsorption behavior & surface adjustment
patterns for water contaminants like as metal ions, organic
& inorganic compounds, & or microorganisms. re is a
debate on capacity commitment, selectivity, &
effectiveness of removal for water purification utilizing
nanocellulose filters & membranes [8].
Due to increasing environmental pollution, study into
poisoning of water by heavy metal ions has risen recently.
Because of ir severe toxicity at low concentrations & ir
bioaccumulation properties, this also causes public
concern. As a result, re has a lot of research on low-cost
& quicker garbage treatment techniques. Now let's look at
Chitosan-based membrane system, which employs an
adsorption method that is likewise low-cost, efficient, &
dependable. Chitosan is a biopolymer made up of natural
polysaccharides that is mostly used for filtering. Obesity &
or chronic illnesses may also be treated with chitosan.
Chitosan may also function as a coagulant / flocculant of
pollutants & impurities, & many research have solved by
ir characteristics, such as eliminating dyes from solution,
depending on ir affinity for various contaminants.
4) Hollow fiber cellulose membrane
se are a different kind of hydrophobic membrane produced
via sintering process. bacteria adhere to fiber wall
because it is constructed with tiny holes. Because walls
are hydrophobic, fiber membrane will last longer.
membrane is composed of alumina, & pore size, as well
as mechanical characteristics, play an important part in
membrane's effectiveness.
Il. LITERATURE REVIEW
Seow T et al. discussed Wastewater Treatment
Technologies in which y explained how Anthropogenic
sources including by way of domestic & farming waste,
along with industrial activities, have polluted several water
resources in past & continue to do so now. general
population is becoming more aware of environmental
repercussions of wastewater pollution. Many classic
wastewater treatment procedures, such as chemical
coagulation, adsorption, & activated sludge, have utilised
to eradicate contaminants; neverless, re are still certain
limitations, notably in terms of high operating costs.
Aerobic method of treating waste water in form of
reductive medium is gaining popularity because of low
operating & looking after expenses. It's easy to get, has
high efficiency, & may destroy contaminants. This article
discusses usage of technologies for treating waste water
for removing contaminants from wastewater, such as
coagulation, chlorination, sedimentation, distillation, & so
on, which are most frequent pollutants in
wastewater..[21].
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International Journal of Innovative Research in Computer Science & Technology (IJIRCST)
S.S.Phuse et al. discussed Water Purification System for
Remote Areas Using Photovoltaics in which y explained
how _ process of eliminating unwanted chemicals,
biological pollutants, suspended particles, & gases from
polluted water is known as water purification. Propose a
water purification system for distant regions that focuses
on supplying rural households with clean drinking water at
a cheap cost & with high dependability. It entails
development, design, & manufacturing of renewable
energy-powered water purifying systems. Solar
pasteurization, reverse osmosis (RO), & ultraviolet (UV)
light sterilization are all part of system, which is powered
by photovoltaic (PV) modules. It's a good way to get rid of
bacteria, viruses, & protozoa in polluted water. This
technique can be made portable, cost-effective, user-
friendly, & energy-efficient enough to - satisfy
requirements for drinking water[22].
Garima Nagpal et al. discussed Water purification by using
Adsorbents in which y explained how re are a variety of
water purification processes available, but adsorption is
among basic, efficient, & cost-effective methods for
wastewater treatment. Agricultural waste, industrial
effluent, natural activated carbon ( ac Biomass, Carbon-
based nanomaterials, Nobel metal-based nanomaterials,
metal oxide-based nano - materials, Spinel ferrite-based
nanomaterials, nanocomposites, dendritic polymers are
examples of nanoadsorbents. This article has covered
geopolymer cement for extraction of various contaminants
from waste. This article also covers elimination of
fluoride, phosphorus, nitrate, & radionuclides from
wastewater. rmodynamic parameters, adsorption isorm
models, & adsorption mechanisms have all investigated.
present article examines numerous types of adsorbents &
analyses state of artin removal of various impurities from
water.[23].
Ill. DISCUSSION
Anthropogenic sources including by means of household
& cultivated waste, along with industrial activities, have
polluted several water resources in past & continue to do
so now. general population is becoming more aware of
environmental repercussions of wastewater pollution.
Many classic wastewater treatment procedures, such as
chemical coagulation, adsorption, & activated sludge, have
utilised to eradicate contaminants; neverless, re are still
certain limitations, notably in terms of high operating
costs. Aerobic method of treating waste water in form of
reductive medium is gaining popularity because of low
operating & looking after expenses. It's easy to get, has
high efficiency, & may destroy contaminants. This article
discusses usage of technologies for treating waste water
for removing contaminants from wastewater, such as
coagulation, chlorination, sedimentation, distillation, & so
on, which are most frequent pollutants in wastewater..
IV. CONCLUSION
On our world, water is a vital resource for existence. As a
result, its preservation is a top concern. With rise in dem&,
supply must satisfy certain criteria) To fulfill
requirements, many purifying methods have used.
Distillation, coagulation, chlorination, sedimentation,
deionization, photo oxidation, etc. are few of such methods
which are used nowadays for water purification. This
review article discusses advantages & disadvantages of
using certain purification methods & materials. Proposed
work to be done to correct flaws & make water safe to
consume in a biodegradable manner. Water purification
has become such a commercial commodity in today's
market that it is evolving on a daily basis thanks to
technological advancements & use of various fiber
composites, polymer membranes, & nanoparticles. This
must be done in a biodegradable & environmentally
acceptable way.
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